Allopatric speciation is due to :
geographical separation of population
hybridization between closely related species
migration of the members of a species from one to other population
both (b) and (c)
What is a key stone species ?
A rare species that has minimal impact on biomass and on other species in community
A dominant species that constitutes a large proportion of biomass, which affects many other species
A common species that has plenty of biomass, yet has a fairly low impact on the community's organization
A species which makes up only a small proportion of the total biomass of a community, yet has a huge impact on the community's organization and survival
Darwin finches are related to which of the following evidences ?
Fossils
Embryology
Anatomy
Geographical distribution
Lichens are important in the studies on atmospheric pollution because they
can grow in polluted atmosphere
can readily multiply in polluted atmosphere
efficiently purify the atmosphere
are very sensitive to pollutants like sulphur dioxide
The scientific name of Java man is
Homo habilis
Homo sapiens neandarthalensis
Homo erectus erects
Australopithecus bisei
Which is not applicable to the biological species concept
Hybridization
Natural population
Reproductive isolation
Gene pool
Evolutionary convergence is characterized by:
development of characteristics by random mating
replacement of common characteristic in different related groups
development of dissimilar characteristics in closely related groups
development of a common set of characteristics in groups of different ancestry
